package com.zhupanlin.gateway.filter;

import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

/**
 * 描述信息：自定义全局过滤器
 *
 * @author zhupanlin
 * @version 1.0
 * @date 2025/2/7 13:34
 */
@Component
@Slf4j
public class RtGlobalFilter implements GlobalFilter, Ordered {
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        ServerHttpRequest request = exchange.getRequest();
        ServerHttpResponse response = exchange.getResponse();
        String uri = request.getURI().toString();
        long start = System.currentTimeMillis();
        log.info("请求【{}】开始: 时间: {}", uri, start);
        // === 以上是前置逻辑 === 
        Mono<Void> filter = chain.filter(exchange)
                .doFinally((result) -> {
                    // 这里为真正的后置逻辑
                    long end = System.currentTimeMillis();
                    log.info("请求【{}】结束: 时间: {}, 耗时: {}", uri, end, end - start);
                }); // 异步放行
        
        return filter;
    }

    @Override
    public int getOrder() {
        return 0;
    }
}